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发布者:来自网络 发布时间:2016-12-29 阅读:144次    关键字: DC-DC
EML3276-5.0A,Synchronous Step-Down DC-DCConverter


EML3276-5.0A,Synchronous Step-Down DC-DC Converter DataSheet

General Description
    EML3276 is a high efficiency, DC-DC synchronous
buck converter which provides 5.0A output loading
after output voltage reach preset voltage. EML3276
uses different modulation algorithms for various
loading conditions. Under heavy load, EML3276
regulates the output voltage using Pulse Width
Modulation (PWM). The PWM mode provides low
output voltage ripple and fixed frequency noise.
While in light load, it enters Power Skip Modulation
(PSM) automatically to ensure a highly efficient
operation at light load condition. Under very heavy
load condition, or when the input voltage
approaches the output voltage, EML3276 enters low
dropout voltage operation under 100% duty cycle.
The internal generated 0.8V precision feedback
reference voltage is designed for low output voltage
request. Low Power-FET Ron synchronous switch
dramatically reduces conduction loss.
    The EML3276 is available in an 8-pin, space-saving
E-SOP-8L package.

Features
Wide Operating Voltage Ranges : 3.0V to 5.5V
5.0A Output Current
High efficiency Buck Power Converter
Auto-select PSM/PWM (Mode=VCC)
Force PWM (Mode=GND)
Power Good Indicator
LDO mode: duty cycle: 100%
Synchronous Power Switches Rectification, no
Schottky Diode Required
1.1 MHz Switching Frequency
Internal Soft-Start
Current Limit Protection
Over Temperature Protection
Output Shorting Protect
Output Over Voltage Protection

Applications
Cellular telephone
Wireless and DSL Modems
Digital Still Cameras
Portable Products
MP3 Players


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